Web roll control mechanism for printing machines



April 25, 1939. w. c. WIEK ING 2,155,431

WEB ROLL CONTROL MECHANISM FOR PRINTING MACHINES Filed Dc. 31, 1935 5Sheets-Sheet l 3a as 34 5 April 1939- 1 w. c. WIEKING 2,155,431

WEB ROLL CONTROL' MECHANISM FOR PRINTING MACHINES Filed Dec. 31, 1955 5Sheets-Sheet 2 April 25, 1939. w. c. WIEKING WEB ROLL CONTROLMECHANISM-FOR PRINTING MACHINES 5 Shets-Sheet 5 Filed Dec. 31, 1935 WEBROLL CONTROL MECHANISM FOR PRINTING MACHINES Filed Dec. 31, 1955 5Sheets-Sheet 4;

April 1939- I wfc. WIEKJNG 2,155,431

WEB ROLL CONTROL MECHANISM FOR PRINTING MACHINES Filed Dec. 51, 1955 5Sheets-Shet'S Patented Apr. 25, 1939 PATENT OFFICE WEB ROLLCONTROL-MECHANISM ron rm'rmo moms William C. Wieking, New York, N. Y.,assignor to It. Hoe & 00., Inc., New York, N. Y., a'corporation of NewYork Application December 31, 1935 Serial No. 56,883

28 Claims.

This invention relates to web supply mechanisms for machines such asprinting machines adapted for printing newspapers and/or like productsthat operate upon webs. More especially this invention relates toimprovementsin web supply mechanisms for use with high speed printing orlike machines whereby the continuity of the machine operation and itsnormal operating speed will not be interfered with when and expiring webroll is replaced by another web roll. The invention also contemplatesthe inclusion in web supply mechanism of safety-and semi-automaticoperating featurestwhereby possible dangerous conditions wil be obviatedandthe 'operation thereof will be simplified.

Among the various objects 'of this invention is the provision of animproved web tension control device having as its principal feature, apositive automatic tension adjusting control wherebythe web-will bemaintained at substantially constant and uniform tension during theentire period of machine operation.

Another object is to provide a device for limiting the movements of theweb tension device to prevent possible damage to the material on thereplacement web roll, while insuring positive and uniform operationthereof.

Still another object is to provide in a printing or like machine,facilities for improved and more efficient operation of the webtensioning device thereof, whereby its operation will be automaticallyassociated, or interlocked, with the operation of the other devices andmechanisms of the machine, to insure eflicient and reasonably safeoperation thereof.

A further object is to provide in a web supply mechanism, having initsstructure a web tensioning device, a web joining device and a webjoin timing device, and electrically operated controls, whereby theoperations of the various devices will be closely associated andinterlocked to insure a maximum of safety and efllciency in theoperation of the entire mechanism,

It is also an object of this invention to provide a web supply mechanismof generally improved construction, whereby the device will be simple,durable and inexpensive in construction, as well as convenient,practical, serviceable and eflicient in its use.

With the foregoing and other objects in view, which will appear asthedescription proceeds, the invention resides in the combination andarrangement of parts, and in the details of construction hereinafterdescribed and claimed.

The preferred embodiment of the invention is illustrated in theaccompanying drawings, wherein:

Figure 1 is a side view of a web supply mechanism for a printing or likemachine and embody-. ing the features of this invention; I

Figures 2 and 2A comprise a front view-of the web supply mechanism shownin Figure 1;

Figures 3 and 4 are enlarged views of a part of the web joining deviceof the web supply mechanism showing the parts in different positions ofoperation;

Figures 5 and 6 illustrate a form of timing device for controlling theoperation of the web joining device shown in the above figures;

Figure 7 is a partialsectionmn line '|l of Figure 2 showing parts of theweb tension ing deing of a side view of the web supply mechanism.

The web supply mechanism illustrated in the above noted drawingsincludes a web roll supporting device or reel II,. which is adapted tobe rotated to position the web rolls supported thereby into desiredpositions by an electric motor l2, and to be moved axially to adjust andalign the web margins by an electric motor l3. A web roll rotating meansforming part of the web ten- .sioning device of this invention includesa roll contacting belt M, which is movable toward and away from the rollby a swingable arm IS, an

electric motor l6 being provided for this purpose. Coiled springs l1(Figures 2 and 2A) are arranged to counteract the weight of the arms IS,the motor l6 being actuated to vary the engagement of the belt M withthe web roll. The motor I6 is of a type wherein a speed reducing meansis directly associated therewith, and which is provided with anelectrically operatedbrake device. A detailed description of thestructure and operation of the above mentioned devices will be found inan application Serial Number 700,652, filed December 2, 1933.

The above mentioned application also shows and describes a webtensioning device and controls therefor, and a web joining device withits control and timing device, both of which are similar in operation tothat shown herein but somewhat difierent in structure. Either form ofthese devices may have the features of this invention associatedtherewith witlnequally efllcient resuits, the formsshown herein being ofa more improved structure and therefore preferred. The particular formof web joining device shown herein is disclosed and described in detailin an application Serial Number 33,814, filed July 30, 1935, now PatentNumber 2,090,296 of August 1937, and the web equalizer deviceillustrated as having a tiltable roller 23 included in its structure isdisclosed and described more in detail in an application Serial Number25,389, filed June 1, 1935, now Patent 29, 1936.

The reelrotatingmoto'r I2, through suitable reduction gear connectionsdisposedin casing I8, drives a gear I9, which is connected to the shaftof thereel H. The motor [2, as will be described hereinafter, issuitably controlled in its rotative movements whereby it will disposeweb rollssupported thereby in operable position and will be inoperativeto rotate the reel during certain periods of the machine operation whenother devices are in operation. The motor I3 is suitably connected tothe reel shaft through-reduction gear in casing 2| to adjust the reel llaxially to move the web running from a supported roll, either to oneside or the other to properly align or space its margin with respect tothe matter to be printed thereon. This margin adjusting motor iscontrolled by suitable electrical devices to be hereinafter described.

The motor l6, through its associated reduction gearing, is adapted, bybeing drivingly' connected to the belt arm through a bevel pinion 22 andgear segment 23, to swing the belt arm to increase or decrease the wrapoi the belt l4 around the web roll engaged thereby, and thereby increaseor decrease the tension on the web being fed therefrom. Suitablecontrols, including mechanically operated electrical controls areprovided,

as will be described hereinafter, for efficiently controllingtheoperation of the motor I5 and to cause operation of the same inassociation with the operation of the other devices, .whereby areplacement web roll can be substituted for an expiring web roll in anexpeditious and eflicient manner. The belt l4 carried by the arm I5 isdriven somewhat slower than, but substantiallyin synchronism with theperipheral speed of the cylinders of the printing machine by a drivenshaft 2' which is drivingly connected to a pulley 25, over which thebelt 14 is reeved, by bevel gears 25 and 21.

The above mentioned controls for the motor l6 include, a pair ofelectrical switches 28 and 29 disposed in a casting 3| and adapted to berespectively operated by switch operating members 32 and 33 (Figure l).The members 32 and 33 are adjustably mounted on a reciprocable operatingrod 34, connected by a link 35 to a lever arm 35. The arm 35 is securedto and swingable with, an arm 31, upon the end of which a ,roller 33 ismounted. The roller 38 is disposed in a loop of the running web 39 andis supported thereby to swing the arm 31 when variations in the'tensionof the web 39 cause the loop thereof, to lengthen or shorten; thetension of the spring 4|. being set to provide the desired normaloperating tension on the web 39 by actuation of nuts 44, which aresubsequently tightened to prevent unauthorized or accidental tensionchanges during machine operation. Variations in web tension arecompensated for by movement of the arm 31 ,which, through theinstrumentality of the arm 35, the link 35 and the operating rod 34 willcause the proper switch 28 or 29 to be closed Number 2,066,307 ofDecember to actuate the motor It in the proper direction to either raiseor lower the arm l5, and therefore either increase or decrease the wrap,and consequent action of the belt I 4, upon the running web roll.

During normal machine operation the running web is pulled through themachine at a surface speed substantially equal to the peripheral speedof the printing cylinder, the belt I4 acting upon the web roll toslightly retard its rotation where by a slight tension is imposed uponthe web. The web tension is apt to vary slightly, due to variousconditions, such as, stretching of the'web and differences in webtexture. Another of these conditions is due to the reduction in thediameter 01' the roll, as the web is removed therefrom, whereby the wrapof the belt l4 thereon is decreased causing a decrease in web tension.As the roll reduces in diameter and the web tension decreases, the webloop in which the roller 33 is disposed lengthens, causing the arm 31 toswing, whereby the rod 34 is moved. Continued movement of the rod 34 inthis direction eventually causes it to actuate the more tension switch29 whereupon the motor l6 immediately operates to lower the arm I5 andcause increase wrap of the belt l4 about the web roll.

To prevent the arm from being swung toogreat a degree whenever either ofthe switches 28 or 29 is operated, whereby a hunting action may be setup, this invention provides a regulating device shown diagrammaticallyin Figure 9, whereby the energization of the motor I5 is by timedimpulses, rather than by a continuously closed circuit. A motor drivencam controlled switch 45 is herein provided for this purpose and isconnected into the electrical circuit of the switches 28 and 29 as willbe hereinafter described. Due to the necessity for quickly stopping themachine in emergencies, the belt arm l5 must be quickly moved downwardlytoward the web roll by operation, of the motor I 6 and may causepossible damage to the roll or breakage of the web. To prevent th arm l5from swinging downwardly too far during such an operation, a movementlimit switch is provided to open the circuit andstop the operation ofthe motor I 6 as will be hereinafter described.

The device for joining the web of a replacement roll with the web of anexpiring web roll herein consists in a pair of arms 46 and 41 pivotallymounted to a support 48 and being detachably connected together by acatch 49 releasable by an electrically operable solenoid 5|. An armwhich is pivotally connected to the arm 45, carries web severing meansgenerally comprising a knife operably supported in a holder 52, and thearm 41 carries a web deflectin brush 53 which, when the arm 41 isreleased from the arm 46, may be moved, to press the running web fromthe expiring web roll onto the replacement roll to join the websthereof, by means of an arm 54, which is connected to the brush arm 41by a cable or chain 55. Provision is made by this invention topreventoperation of the reel the web tensioning motor [6 when the arms 46 'and41 are in web Joining position, and during their operation to join thewebs, to prevent possible damage should the reel be inadvertentlyrotated during such operations. The means for preventing operation ofthe above reel and web tension motors comprises switches 56 and 51respectively (Figures 1 and 9), operable by movements or the arms 41 andinto operable posirotating motor 42 and to prevent operation of tion,which switches are connected into the respective motor control circuitsas will be described hereinafter. a

The operation of the web joining. mechanism is under the control of atiming cam (Figure 5) mounted to rotate with the replacement web rolland operable through a system of levers and links 59 to actuate a switch6| mounted upon a reel supporting bracket 62. The switch 6| is closed bythe cam 58, when an adhesive covered area on the web of the replacementroll is in proper position relative to the web deflecting brush 53(Figure 3), to permit actuation of the solenoid 5| by a switch 63(Figures 1 and 2), operated by a trip handle 68 during'the movement ofthe arm 54 to press the brush 53 to deflect the web of the expiring webroll against the replacement roll. The switch 63 is so arranged that inconjunction with switch 6|, it acts to energize a relay which in turnenergizes the solenoid 5| to release the catch 49, (Figure 3) thecircuit of which arrangement will be described hereinafter.

Provision is also included to manually adjust the operating members 32and 33 to vary the actuation of the switches 28 and 29 thereby.- Theoperating rod 34, upon which the members 32 and 33 are threadedlymounted, extends into a sleeve 64 having a bevel gear 65 secured theretowhich is in mesh with a bevel gear 66, secured to which is a handle 61.The connection between the rod 34 and the sleeve 64 is such as to permitsliding movement of the rod 34 axially with respect to the sleeve '64while insuring rotation of the rod with the sleeve. It is obvious thatthe manually rotatable handle 61 may be replaced by an electric motorhaving reduction gearing associated therewith to permit a remote controlof the members 32 and 33 if such is desired.

Provision is included whereby tension may be applied to the running webwhen the web roll is moved, by rotation of the reel II, out ofengagement with the belt I4 in preparation for making upon a rod I3. Therod 13 is threadedly secured to an adjusting handle 14 having anabutment I5 thereon. A spring I6 is disposed between the abutment I5 andthe block I2 to urge the block away from the abutment and gi'ipp ly bindthe band 69 to the brake drum 68, the abutment I5 being supported by abracket 11 secured to the reel arm. A manually swingable cam member I8is pivoted upon the stud II and is operable to cam the block 12 alongthe .rod I3 to release the band from the brake drum. A handle I9 isprovided to swing the cam member 18.

With particular reference to Figure 9, the normal operation of the webtension device when the machine is in operation, is controlled by thetension on the running web operating through the switches 28 and 29 bymeans of the swingable arm 36. I tension will be imposed upon therunning web 39 by the belt I4, by action of the motor I6 under controlof the switches 28 and 29, and the cam operated impulse switch 45.During the normal operation of the machine, the web joining arms 46, 46'and 41 are folded back and the arm 54 is in a raised position, asindicated in dotted lines in Figure 1: 1

Assuming that the machine is in operation,

Substantially constant and uniform' coil 8|, which is in the main motorcircuitof the I now not in operation and therefore the coil 84 is notenergized and switch 85 is open. The emergency or red button stop,provided to stop the.

machine when an emergency arises, is also open, whereby the coil 86 isnot energized, and a switch 8'! controlled thereby, is open, while aswitch 88 is closed. The operating arm 54 and the arms 46, 46' and 41are in raised position, as shown in dotted lines in Figure l, and therunning web 39 is being taken from the roll being engaged and controlledby the belt I4 as indicated by dash lines in Figure 1. The motor 89,driving the impulse relay 45 is running, whereby, through operation ofcam 9|, the switch blades 92 are being intermittently engaged anddisengaged. The motor 89 is controlled by a switch 93 which throughconductor 94 leading from a line wire LL2, connects it to a line wireLLI through a conductor 95.

Intermittently closing of the switch blades 92 of the switch 45, one ofwhich is connected to the line wire LLI by conductor 95, completes acircuit through a conductor 96 to the closed switch 82 and through aconductor 91 to a closed snap switch 98. From the switch 98, the circuitcon.- tinues through a conductor 99 to one lead of the less tensionlimit switch 28, the other lead of which, through a conductor I8 I, isconnected with a normally closed push button switch I82. From a theswitch I82, through a conductor I83, the circuit continues through acoil control switch I84 and a conductor I85 to a less tension. controlcoil I86 in the tension motor (I6) control box I81. Y

From the coil I86 thev circuit continues through a conductor I88 to acoil controlled closed switch I89 and then through a conductor II8 into'thev reel motor (I2) control box III, where, through normally closedforward rotative controls (not shown) but which are operable byenergization through a coil II2, the coil I86 is connected with the linewire LL2. The less tension coil I86 is adapted to actuate suitablecontrols in box IN to cause the motor I6 to operate to raise the arm I5when the switch 28 is closed by the member 32, by movement imposedthereon by the raising of the arm 31 due to shortening. of the web loopin which the roller 38, on the arm 31, is disposed.

The "less tension coil I86 may also be energized to raise the arm I5 bythe closing of the normally open push button switch "I, one contact ofwhich is connected to the line LLI through a conductor I 32. From theother contact of the switch "I the circuit continues through theconductor I83, the coil control switch I84, the conductor I85, the coilI86, the conductor I88, the normally closed switch I89, the conductorIII), and thence through the control box III to the line LL2 as abovedescribed.

The closing of the switch 45 also completes a circuit from line wire LLIthrough the conductor 95 through the contacts 92 of switch 45 andthrough the conductor 96 and the closed switch a, conductor I26, to amore tension coil I21,

disposed in the motor control box I01, to actuate suitable controlstherein and cause the motor I6 to operate to lower the arm- I when thelimit switch 29 is closed, by the member 33 under movement imposedthereon by the lowering of the arm 31, due to elongation of the web loopin which the roller is disposed.

From the coil I21, the circuit continues through a conductor I28 to acoil controlled normally closed switch I29 and then through theconductor I08 to the switch I09, whereupon it is connected to the lineLL2 as in the case of the less tension circuit described above. The"more tension coil I21 may also be energized to operate the motor I 6 tolower the arm I5 by the actuation of a push button switch I3I to connectthe conductor I23 directly with-the line wire LLI through the conductorI32. The upward movement of the arm I5 is limited bya limit switch I33disposed to be actuated by the arm I5 when it reaches its predeterminedlimit of upward movement. The switch I33 is normally closed and isopened by the arm I5 to open the circuit from the line LLI throughconductor 95 to a coil I34 through a conductor I35, the other terminalof which is connected to the line wire LL2 by a connection with theconductor 94. Deenergization of the coil I34 opens the above mentionedswitches I04 and 1 controlling the tension motor control coils I06 andI21 respectively, thus preventing the automatic operation of the motorI6 until the switch I33 is again closed by the lowering of the arm I5 byactuation oi. the push button switch I3I.

By the provision of the above controls the tension on the running web 39will be automatically maintained within efficient operating limits anddue to the intermittent circuit closing action of the switch 45 thevarious more and less tension adjustments of the arm I5 will be in,gradual intermittent steps instead of in one complete movement, whichdue to the momentum and other conditions would tend to cause a so-calledhunting action, whereby, the switches 28 and 29 would alternately act inan attempt to equalize the tension to the desired amount. By controllingthe action of these switches by the switch 45, the mechanism between thesteps of adjustment will come to rest and the momentum etc., of themoving parts will be prevented from interiering with the smoothoperation desired.

By being in the circuit with the switch 81 controlled by the emergencyoperated coil 86, the more tension coil I21 will be energized to apply abraking action to the roll through the lowering of the arm I5 to preventit from over running when the machine is stopped in an emergency, theswitch connecting the conductors II6 with the LLI through a conductorI36. The stopping'of the machine causes denergization of the coil 8I andthe consequent opening of switches 82 and 83 prevents the operation ofthe more and lesstension switches 28 and 29.

As stated above, the control arm 54 is in raised position, whereby theswitch 51 is normally closed, permitting the operation of the motor I2to rotate the reel II, forwardly, by a push button switch I4'l or,reversely, by a push button switch I 42. The switch -I4I, when actuated,closes the circuit constituted by a conductor I43 from the line wireLL2, a conductor I44 leading to a switch I45 and from there, through aconductor I46 to the, forward movement control coil II2 in the reelmotor control box III. From the coil II2 the circuit continues throughaconductor I41 through the switch 51, through a conductor I48, to theswitch 88 controlled by coil 86. I The switch 88 is connected to theline LLI through the conductor I36.

The reverse movement push button switch I42, when actuated, connects areverse control coil I49 in box III, through a conductor I5I with theline wire LL2 by the use of the conductor I43. From the coil I49 thecircuit traverses the same path as does the forward control circuitleaving the box by a conductor I". By passing through the switch 51,which is normally closed when the arm 54 is in inoperative position, therespective reel motor circuits above described are under its control,thus insuring that when the arm 54 is lowered in preparation of making aweb join and the switch 51 is thereby opened, due to-the engagement of asuitable projection on the arm, no

rotation of the reel ispermitted. This interlocking feature preventspossible damage to the roll or the breaking of possibly interferingparts.

Preparatory to joining the running web 39 to the web of a replacementweb roll, the belt arm I5 is raised and the reel II rotated, to positionthe replacement roll into web joining position.

These operations are accomplished, substantially automatically, by theclosing of a push button switch I84. The closing of the switch I84energizes swich controlling coils I55 and I6I. One contact of the switchI84 is connected by a conductor I5'I to line wire LL2, the other contactbeing connected by a conductor I85 through a conductor I59 to the coilI6I. From the coil I6l, the circuit continues through a conductor I62and a switch I63, controlled by the coil I34 to I the line wire LLI.

Conductor I59, which is in connection with the line LL2 as describedabove, also leads to the coil I55, from which, a conductor I54 leads toa normally closed switch. l52. From the switch I52.

the circuit continues through conductor I53 and conductor I41, to thenormally closed switch 51, from which a conductor I 48 leads to theclosed switch 88 which is connected to the line LLI by the conductorI36.

Energization of the coil IIiI will close the switch II3 whereby the armI5 will be raised by motor I6 and open switch I whereby the reel motorI2 is prevented from-operating. One contact of the switch H3 isconnected to the line LLI by the conductor I I4 and the other contactthereof is connected by a conductor I03 to a switch I04, controlled bythe coil I34. From the switch I04 the circuit continues throughconductor I 05 to the coil I06, from which a conductor I08 con' nectswith a switch I09 which is connected to line LL2 by a conductor IIOthrough box III.

Energization of coil I06 actuates motor I6 to raise the arm I5 to thelimit of its upward movement whereupon the switch I33 is openeddeenergizing the coil I34. Deenergization of the coil I34 will open theswitches I04 and I63 whereby the motor I6 and upward movement of the armI5 will be stopped, and the reel motor I2 started to rotate the reel IIto dispose the replacement web -roll into web joining position. Thedeenergization of the coil I34will open a switch I64 whereby a circuitfrom wardly. upon the arm 54 and actuating the trip line LLI to theswitch m and leading therefrom through a conductor I65 into the controlbox 202 and the conductor I82 to the release coil of the motor brakewill be opened whereby the brake will act to hold the motor I6 againstrotation and thereby the arm I5 in its up position. The motor I2 isstarted when the switch I63 is opened, due to the deenergization of thecoil I6I whereby the switch I45 is closed to complete a circuit throughthe forward rotating coil II2, which circuit includes conductor I51 fromline LL2 to the closed switch I58 and .to the closed switch I56, theswitch I56 having been closed by energization of the coil I55 whenswitch I84 is actuated. From the switch I56, the circuit continuesthrough conductor I59, closed switch I4I, conductor I44, switch I45,conductor I46, to the coil II2, from which a conductor I41 leads to theclosed switch 51, from which the conductor I48, switch 83, and conductorI36 lead to the line LLI. When the reel II has rotated sufliciently todispose the replacement roll in proper position, the limit switch I52 isopened, whereby the switch I56 opens due to the deenergization of thecoil I55, controlled by the switch I52, and the motor I2 stops. The webrolls are now in the position shown in Figure 1, the web 39 is runningfrom the expiring web roll and the replacement web roll is in positionto have. the web 39 secured to the web thereof. j

The next operation is, to lower'the arms 46, 46' and 41 into pre-webjoining position as shown in full lines in Figure 1, from the foldeddotted position, and to press the holder 52 against the web 39 todispose it into pre-joining position in respect to the replacement roll,by swinging" downwardly the arms 54 into the position as shown in fulllines in Figure 1 from its upwardly disposed dotted position. Theswinging of the arm 54 downwardly opens the switch 51, as abovedescribed, preventing operation of the reel ro-' and the conductor 94,the other terminal of which is connected to the switch 56, which, by aconductor I16 and the conductor H4, is connected to the line LLI. Theswitch 56 is closed by the engagement of a'stud I14 on the brush arm 41,with the switch actuating lever system I15, which is arranged to holdtheswitch 56 closed until the brush arm is further moved by the arm 54 tomake the web join, After a web Join is made, the stud I14 passes by thelever system I15 without closing the switch 56 due'to a swinging leverincluded in the lever system.

Energization of the coil I11 opens the normally closed switch I99whereby the automatic tension circuits above described are openedpreventing operation of the web tensionmechanism and closes a switch I19whereby the release coil in the brake oi the motor I6is energized torelease the brake and permit the arm I5 tocome down from its up positionand engage the replacement roll to rotate and accelerate it tosubstantially the speed of the running web 39. Closing of the switch I18connects the line LLI through conductor I8I and conductor I82 with themotor brake'which is connected to the line LL2 by a conductor I83.

The web join is now made by pressing downhandle 69 thereon, to close theswitch 63'. The closing of the switch 63, as above described, causes therelease of the arm 41 from the arm 46 whereby the brush 53 presses therunning web against the replacement roll. This operation is timed by thecam 58, which through the lever mechanism 59, on each reel arm,,actuatesthe normally open switch 6.I on the reel support, to close the circuitfrom the line LL2, through a conductor I66, to a conductor I61, leadingfrom the switch 6| to the switch 63. From the switch 63 the circuitcontinues through a conductor I68, to .one terminal of a coil I69, theother terminal of which is connected to the line LLI through a conductorI12 and the conductor I32. The coil I69, when energized, closes anormally open switch I13 to energize the solenoid 51 and releases thearm 41 from the arm 46 and permits it to swing toward the replacementroll.

When the arm 41 is moved toward the roll after its release from the arm46 the switch 56 and I42, if desired.

The axial movement of the reel by the margin motor I3-is controlled bylimit switches I9I and I92, which are actuated by members on the reel tostop the operation of the motor when the determined movement of the reelis reached. Push button switches are provided for operating the motorI3. For instance, push button switch I93 when closed connects the lineLL2, through the conductors I43, and I81, with the limit switch I9I by aconductor I95, from the switch I9I, through a conductor I96. The circuitcontinues to a motor direction control coil I81 in a control box I98 andthen to line LLI. Likewise, switch I94 from the conductor I 81, leads toswitch I92, from which aconductor I99 leads to the other motor rotationdirection coil 29I and thence to line LLI.

Provision is made whereby when the machine is stopped by actuation of aremotely disposed switch (not shown), which closes a circuit to'energize the emergency stop coil 86, the switch 31 is closed and themotor I6 is operated to lower the arm I5 and thereby cause the belt I4to apply a braking action upon the web roll to prevent over running ofits web. The amount of such arm movement is limited by the limit switchI24 and this movement, in this instance, is not under the control of thecam controlled switch 45. The

switch 81 closes a circuit from the line LLI through the" conductor I36to the conductor II 6 causes immediate stopping oi the roll rotation.

whenever the machine is stopped in an emergency,

the limit switch I24 opening when the arm II has reached itspredetermined down limit to stop the .motor It by opening the abovecircuit.

All of the motor control boxes I01, I H, and I" are'connected withpowerlines Ll L2, and L3 and the motors l2, l3 and [6 are connected bysuitable conductors to the controls in the respective box. Suitablecontrols (not shown) are provided in control box I01 whereby whenevercoils I08 and I2! are energized to operate the motor [6 .same.

Other features are, the push button and up limit switch combinationincluding, the switches Ill and-I33 whereby the belt arm I! may beraised to fac i tate threading of the web into the machine, an heldthere, should an emergency I stop occur while such an operation is beingperand the termed; a push button and down limit switch combinationincluding the switche'slil and I24 for bringing the belt arm I! downwhen desired; provision of controls whereby when the arm I5 is inup-saie position, rotation of the reel II is possible without the arm I!being permitted to tscelnd except by actuation oi the push button swi h3 1 The provision of means to automatically raise the belt arm I! tomove the belt l4 out of the way when a replacement roll is beingdisposed in web joining position by the rotation oi the reel ll,prevents strains being imposed upon the web of the roll, while it isbeing brought into such position whereby possible fracture of, or damageto,

the same might result. Other Ieaturas are, the

provision of the switch 88 whereby the reel connot be rotated when themachine is stopped due to an emergency; and the brush arm interlockincluding, the switch 56 whereby the reel is inoperative when the brusharm 41 or its controlling arm 54 is swung down into web pre-joined posi-On, It will be understood that the invention may be embodied in otherspecific forms without departing from the spirit or essential attributesthereof, and it is therefore desired that the present embodiment beconsidered in all respects as.

illustrative and not restrictive, and it will be further understood thateach and every novel teature and combination present in or possessed bythe mechanism herein disclosed forms a part of the invention included inthis application.

What I claim is: 1. In a web supply mechanism, a web tensioning deviceincluding a movable web roll .engaging member, an electric motor formoving said member, electrical controls for said motor, web engagingmeans aflected by web tension i'or actuating said controls to cause themotor to move the member to vary the engagement of themember with theroll and thereby compensate for variations in web tension, and anelectrical device operable to permit only intermittent operation of saidcontrols. a

'2. In a web supply mechanism, a web tensioning deviceincluding amovable web roll engaging member, an electric motor for moving saidmember, anelectrical control ior said motor to operate it to increasethe engagement oi. the member on the roll to provide more web tension,an electrical control for said motor to operate it to lessen theengagement of the member on the roll to provide less tension, webengaging means aiiected' by the tension of a web running from the rollto actuate said controls, and an electrical device operable to permitonly intermittent operation of both controls. I

3. In a. web supply mechanism, a web tension ing device including amovable web roll engaging member, an electric motor for moving saidmember, an electrical control for said motor'to operate it to increasethe engagement of the member on the roll to provide more web tension, anelectrical control for said motor to operate'it to lessen the engagementof the member on the roll to provide less tension, web engaging meansafiected by web tension for actuating said controls, and an electricaldevice comprising a constantly operating intermittent circuit closingswitch to limit the action of said controls.

4. In a web supply mechanism, a web tensioning device including amovable web roll engaging member, means to move said member, a swingablearm movable by variations in web tension, means actuated by movements'of said arm to control said member moving means to compensate for webtensionvariations, and means to control the operation 01 said membermoving means to cause it to operate in intermittentsteps.

5. In a web supply mechanism, a web roll supporting member, a runningbelt adapted to engage the roll on said member to rotate the same, aswingable armsupporting said belt, intermittently operable electricalmeans to move said arm to vary the engagement oi said belt upon theroll, means affected by the tension of the web running from the roll tocontrol said electricalarm moving means, and electrical meanscontrolling said armmoving means to limit the movement of said armtoward the roll on said supporting member.

6. In a web supply mechanism, a web roll supporting member, a runningbelt adapted to engage the roll on said member to rotate the same, aswingable .arm supporting said belt, intermittently operable electricalmeans to move said arm to vary the engagement of said belt upon theroll, an electrical control for said arm moving means to raise said beltout of engagement with, the roll on said reel, and an electrical controlto limit the amount of such movement.

7. In combination with a machine adapted to operate upon a web, a webroll supporting reel, electrical means to rotate said reel, mechanismmovable into operative position for joining the web of a roll supportedon said reel with a web running into said machine, electrical means forcontrolling said web Joining mechanism, a web tensioning device,electrical means for controlling said tensioning device, electricalinterlocking means between the controls for said mechanism and saiddevice, to cause said web tensioning device to be inoperative when saidweb joining mechanism is in operation, and electrical interlockingmeans, between said reel rotating means and said web joining mechanismcontrol means,

,to cause said reel rotating means to be inoperative when said webjoining mechanism is in operative position.

8. In combination with a machine adapted to operate upon a web and to bestopped in an emergency, a web roll supporting reel, an electrical motorto rotate said reel, electrical controls 7 I for said motor, andelectrical interlocking means to prevent operation of said reel rotatingmotor controls, when said machine is stopped in an emergency. Y

9. In combination with a machine adapted to operate upon a web and to bestopped in an emergency, a. web roll supporting reel, an electricalmotor to rotate said reel, electrical controls for said motor, webtensiom'ng means including an electrical motor, a swinging arm, adaptedto be moved by said motor to apply more tension to a web, electricalcontrols for said motor, and electrical interlocking means to preventthe operation of said reel rotating motor controls and to cause said armmoving motor controls to operate to apply more tension to the web whensaid machine is stopped in an emergency.

10. In a web supply mechanism, a web tensioning device including acontrol member movable into and out of engagement with a rotating webroll, to control the speed of rotation thereof, means controlled by thetension of the web running from the'roll, to vary the effect of saidcontrol member, and means to limit the movement of said control memberin either direction.

'11. In a web supply mechanism, a web tensioning device including acontrol member movable into and out of engagement with a rotating webroll, to control the speed of rotation thereof, intermittently operablemeans controlled by the tension of the web running from the roll, tovary the effect of .said control member, and means to limit the movementof said control member in its movement into engagement with the roll.

12. In a web supply mechanism, a web tensioning device including acontrol member movable into and out of engagement with a rotatable webroll, to control the speed of rotation thereof, means to move saidmember out of roll engaging position, a roll support, means to move saidroll support to position the supported roll in operative position, andan interlocking control to insure operation of said member moving meansbefore said roll supporting means operates.

13. In a web supply mechanism, a web tensioning device including acontrol member movable into and out of engagement with a rotatable webroll, to control the speed of rotation thereof, means to move saidmember out of-roll engaging position, a roll support, means to move saidroll support, to position the supported roll in operative position, aninterlocking control, to insure operation of said member moving meansbefore said roll supporting means operates, and another control toprevent operationof said member moving means, while said roll supportingmeans is, operating.

14. In a web supply mechanism, a web tensioning device including acontrol member movable into and out of engagement with a rotatable webroll, to control the speed of rotation thereof, means to move saidmember out of roll engaging position, a roll support, means to move saidroll support, to position the supported roll in operative positon, aninterlocking control to insure the operation of said member moving meansbefore able into and out of engagement with a rotatable web roll, tocontrolthe speed of rotation thereof, means to move said member out ofroll engaging position, a roll support, means to move said roll support,to position the supported roll in operative position, an interlockingcontrol to insure the operation of said member moving means before saidroll supporting means operates, means to move said member intoengagement with the roll after the same has been positioned by said rollsupport, and interlocking means to stop and prevent further movement ofsaid roll support when said member is in roll engaged position.

16. In a web supply mechanism, a web tensioning device including acontrol member movable into and out of engagement with a rotatable webroll, to control the speed of rotation thereof, means to move saidmember out of roll engaging position, a roll support, means to move saidroll support, to position the supported roll in operative position,means to press a running web against the web roll on said support, aninterlocking control to insure operation of said member moving meansbefore said roll supporting means operates, means to move said memberinto engagement with the roll after the same has been positioned by saidroll support, and interlocking means to prevent movement of said rollsupport, while said web pressing means is operated.

17. In a web supply mechanism, a-webtensioning device including acontrol member movable into and out of engagement with a rotatable webroll, to control the speed of rotation thereof, means to move saidmember out of roll engaging position, a roll support, means to move saidroll support, to position the supported roll in operative position,means to press a running web against the web roll on said support, aninterlocking control to insure operation of said member moving meansbefore said roll supporting means operates, means to move said memberinto engagement with the roll, after the same has been positioned bysaid roll support, interlocking means to prevent movement of said rollsupport and said web tensioning device, while said web pressing means isoperating, and means to release said interlocking means after operationof said web pressing means, to permit operation.

of said web tensioning device.

18. In a web supply mechanism having means to support a web roll, a webtension controlling device including an electric motor, a web rollengaging member actuated by said motor to vary web tension, a controlfor said motor, means affected by the tension of the web for actuatingsaid control, and an intermittently actuated switch to control saidmotor control and permit only intermittent operation of said motor whenthe control is actuated by said means.

19. In a web supply mechanism, a web roll carrying reel adapted to carrya. replacement roll, electrical'means to rotate said reel to positionthe replacement roll relatively to a running web, means to support areplacement roll engaging and rotating device and being movable towardand away from the roll, electrical means to move said device support,and electrical interlocking controls between said reel rotating meansand said support moving means to actuate the latter and move said devicesupport away from the roll before said reel rotating means is operated.

20. In combination with a machine adapted to operate upon a web, a webroll supporting reel, electrical means to rotate said reel, mechanismmovable into operative position for joining the webs of a roll supportedon said reelwith a web running into said machine, electrical means forcontrolling said web joining mechanism, a web to control tensioningdevice movable toward and into engagement with the supported roll,electrical means for controlling said tensioning device, electricalinterlocking means between said mechanism and said device controls tocause said web tensioning device to be inoperative when said web joiningmechanism is'in operation, and means tov limit the movement of saidwebtensioning means toward the supported roll.

21. In a web supply mechanism, a web tensioning device including amember movable into and out of engagement with a rotatable web roll thespeed of rotation thereof, means to actuate said member, means tosupport the web roll, said roll supporting means b81 8 movable todispose the roll in operative position, means to move said rollsupporting means, means to control the operation of said memberactuating means and said roll support moving means, to prevent theoperation of one while the other is operating, and means to limit themovement of said member into engagement with the roll.

22. In a web supply mechanism having means to support a rotatable webroll, a web tensioning device including braking means acting on thesupported roll, an electric motor for actuatin said braking means,electrical controls for said motor, web tension controlled means foractuating said controls and causing the motor to actuate said brakingmeans to vary its action on the web roll and compensate for variationsin web tension, and anintermittently operating switch in circuit withsaid controls to cause step by step operation of said braking meanswhile it isbeing actuated by said motor.

23. In a web supply mechanism having means to support a rotatable webroll from which a web is running, braking means adapted to act upon asupported roll, electrically operated means to actuate said brakingmeans to vary its braking action on the roll, means adapted to beactuated by changes in tension of the running web to control saidelectrically operated means, and means in control of said control meansto cause intermittent action of said braking means as it is be'- ingactuated by said electrically operated means:

'24. In a web supply mechanism, a web roll supporting member, a brakemechanism having a movable part in engagement with the roll on saidmember to effect a braking action thereon,

upon the roll, and means aflected by the tension of a web running fromthe roll to control said 7 intermittently. operable means.

25. In a web supply mechanism, a web tensioning device including a brakemechanism having a movable part in engagement with a rotating web rollto effect a braking action thereon, means to move said part,intermittently operable means controlled by the tension of the webrunning from the,roll to control'said part moving means to vary thebraking eflect of said braking mechanism upon the roll, and means tolimit the movement of said braking mechanism part.

26. In a web supply mechanism having means to rotatably support a webroll from which a running web is fed to a machine, a web tension deviceincluding a floating roller running in a and arranged to vary thepressure oi the member on the roll when the position of the floatingroller is changed, and means in the control circuit of said electricallyoperated means to cause intermittent operation thereof as it operates,to vary the pressure of the member on the roll by successive steps.

27. In a web supply mechanism, a web tensioning device including amember; adapted to frictionally engage the periphery of a rotating webroll to apply a braking action thereto, means to move said member toincrease its frictional engagement with the periphery of the .roll,means controlled by the tension of the web running from the roll tocause operation of said member moving means to move said member toincrease its frictional engagement with the roll, and other means tocause the member to move in a series of successive steps.

28. In a web supply mechanism, a web tension-' ing device including amember adapted to frictionally engage the periphery of a rotating webroll to apply a braking action thereto, means to move said member todecreaseitsfrictional engagement with the periphery of them, meanscontrolled by the tension of the web running from the roll to causeoperation of said member moving means to move said member to decreaseits frictional engagement'with the roll, and other means to cause themember to move in a series of successive steps.

WILLIAM C. WIEKING.

